Question

✒✒✔Class 10/math/✒ Chapter/ arithmetic progression.. ✔✔✒✒


1.✔✔Find the sums given
below :✔✔✒✒

$7 + 10 \times \frac{1}{2} + 14 + .... + 84$
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TQ ✌✌


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Answer 1

The answer is
$1046 \frac{1}{2}$
Steps in the attachment.

Answer 2

here a=7
d= 10 1/2 -7=21/2-7=7/2