Can anyone help me to solve this question? And also, can anyone please help me t

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secondary 4 | A Maths
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secondary 4 A Maths

Can anyone help me to solve this question? And also, can anyone please help me to explain to me your working?Thanks^^

Date Posted: 6 years ago

Comments 1 add a comment

Winnie Tang

6 years ago

Hye sir, thanks for your ans, but i would like to ask sir why did sir put 10a in every sum of odd and even?
It would be a pleasure if sir do this.Thanks^^

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Here you go.

Date Posted: 6 years ago

Comments 3 add a comment

Winnie Tang

6 years ago

Thanks sir,but i would appreciate if sir can explain to me why did sir put 10a for every sum of odd and even no.thanks

Muhammad Shahbaz

6 years ago

For all the odd (1st, 3rd, 5th....19th term) and even (2nd, 4th, 6th......20th term) terms, there are a total of 10 terms each. Using the formula a + (n-1)d, where a is the first term and will always be a constant. And when you add the terms, you will actually have 10 of a terms so this will correspond to 10a. Hope you understand

Winnie Tang

6 years ago

Oh I see.., anyhow thanks sir^^!!