Question

If 2x+1 x+2 2 and 5 are in proportion then what is the mean proportional between 3.5 (1-x) and 8 (1+x)=?

Answer 1

$\fontsize{18}{10}{\textup{\textbf{The required mean is 21/4}}}$

Step-by-step explanation:

Since, 2x+1, x+2, 2, and 5 are in proportion,

them (2x+1)/(x+2)=2/5

=>10x+5=2x+4

=>x=-1/8

Let a be the mean proportion between 3.5 (1-x) and 8 (1+x)

then

3.5 (1-x)/y=y/8(1+x)

=>y^2=3.5*8*(1-x^2)

=>y^2=28*(1-1/8^2)

=>y^2*=4*7*63/64

=>y^2=2^2*7*7*3*3/(8*8)

=>y=2*7*3/8

=>y=21/4

Answer 2

Answer:

jshddjjdisisjwje नमस्ते के liye dekhi नमस्ते के liye koi नमस्ते के नमस्ते के लिए भी यह एक बहुत बड़ा योगदान है kya hai kya hai kya hai bhai के center नमस्ते के center m दिक्कत होती है कि वे इस प्रकार हैं तो यह भी है