Question

]Which term of the arithmetic cprogression 5,15,25,........will be 130 more than its 31st term

Answer 1

Answer:

a=5 ,d= 10

31 term=a+30d

5+30×10

5+300

305

adding 130 to 305,we get

435

now let us take 435 as nth term.

nth term =a+(n-1)d

435=5+(n-1)10

435=5+10n-10

435=-5+10n

10n=430

n=43

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