Advertisements
Advertisements
प्रश्न
Find the geometric mean between 2a and 8a3
उत्तर
Geometric mean between 2a and 8a3
= `sqrt(2a xx 8a^3)`
= `sqrt(16 xx a^4)`
= 4a2
APPEARS IN
संबंधित प्रश्न
Find, which of the following sequence from a G.P. :
`1/8, 1/24, 1/72, 1/216, ................`
Find the geometric progression with 4th term = 54 and 7th term = 1458.
The fifth, eight and eleventh terms of a geometric progression are p, q and r respectively. Show that : q2 = pr.
Find the third term from the end of the G.P.
`2/27, 2/9, 2/3, .........,162.`
If for a G.P., pth, qth and rth terms are a, b and c respectively; prove that : (q – r) log a + (r – p) log b + (p – q) log c = 0
Q 7
Q 6
If a, b and c are in A.P. and also in G.P., show that : a = b = c.
Find the sum of G.P. :
`(x + y)/(x - y) + 1 + (x - y)/(x + y) + ..........` upto n terms.
Q 3.3