2. Find the mentioned terms of the following sequences in AP. (a) The seventh term of 3, 7, 11, 15, .... (b) The fifteenth term of 18, 13, 8,3,.... (c) The ninth term of 6,-2, 2, 6, .... (d) The eleventh term of 4,7.5, 11, 14.5, ....
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Answer:
a17=67
a15=-52
a9=38
a11=34
Step-by-step explanation:
a.
solution.
a= 3
d= 4
now
a17 =a + 16d
a17=3+16×4
a17 =3+64
a17=67
b.
solution.
a=18
d=-5
a15 = a+14d
a15 =18 + 14×-5
a15=18+(-70)
a15=18 - 70
a15= -52
c.
solution.
a=6
d=4
a9=6+8×4
a9=6+32
a9=38
d.
solution.
a=4
d=3
a11= 4 +10×3
a11= 4+ 30
a11=34
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