the second term of the arithemetic sequence is 18 and fourth term 32. find the third and first term
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Step-by-step explanation:
a+d=18 (given) eq-1
a+3d=32 (given) eq-2
On subtracting eq-1 from eq-2,we get
a+3d-(a+d)=32-18
a+3d-a-d=14
2d=14
d=7
putting value of d in eq-1
a+d=18
a+7=18
a=18-7
a=11
putting values of a and d in a+2d
11+2(7)
25
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