Question

help me to solve all the questions given..... correct answer will be marked as brainliest..... don't spam ​

Answer 1

2.5(4^2)-2(4)=5(16)-8=80-8=72

3. a+(n-1)d=2n+5
If d is 2, a+2n-2=2n+5
a+2n-2n=5+2
a=7
4.sum=n/2(2a+(n-1)d)
=4/2(2a+3d)=24
4a+6d=24
2a+3d=12
Then do the sum of squares method (sorry I can’t continue because we didn’t get taught that yet)
Get the first number then use the ap formula again

Please mark as brainliest and thank all my answers.

Answer 2

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